Harrow



I E. W. McNABB.

HABROW.

APPLICATION FILED JULY 13, I920.

Patented Nov. 15, 1921 Zlwvwkbm EWM abb.

, UNHTEQ Ea'lATESPATENT OFFICE.

ERNST WATSON Manner, or warnnrown, 'rnnnnssnn, Assrenon 'ro "onrrnnnannow MFG. 00., ING, or'wnrnn'rowiv, 'rnnnnssnn HARROW.

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Application filed July 13,

To aZZ whom it may concern Be it known that I, ERNST WA'rsoN Mo- NAB-I3,a citizen of the United States, residing at l/Vatertown, in the countyof Wilson and State of Tennessee, have invented a new and useful Harrow,of which the following is a specification.

This invention relates to harrows, and more particularly to adjustableharrows wherein the tooth bars thereof may be ad j usted with relationto each other for accomplishing various kinds of work.

The primary object of the invention is to provide a device of this.character having a novel form of adjusting means, whereby the tooth barsmay be adjusted withfacility and eliminating any possibility of theadjusting means becoming bent or twisted, to render the deviceinoperative.

A further object of the invention is the provision of means foradjusting the outer tooth bars, which movementsimultaneously adjusts theinner tooth bars, toward and away from each other.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention.

Referring to the drawing Figure 1 illustrates a plan View of a harrowconstructed in accordance with the present invention.

Fig. 2 illustrates a sectional view taken on line 22 of Fig. 1.

Referring to the drawing in detail, the reference character 5 designatesthe tooth bars of the harrow, each of which is provided with a pluralityof openings to accommodate the teeth 6, which are disposed in spacedrelation with each other longitudinally of the respective tooth bars,and secured thereto in any suitable and well known manner.

Secured to each of the bars, adjacent the respective ends thereof, arethe apertured lugs 7 the lugs of one bar being disposed directlyopposite the lugs of the adjacent bar to accommodate the right angledends of the link members 8, there being provided Specification ofLetters Patent.

1920. Serial No. 395,880.

a bar 9 having openings adapted to be positioned over the ends of therespective link members for securing the link members to the lugs 7.

The adjusting means which form an important feature of the invention,include a relatively long arm 10 having one end thereof formed into ahook 11, which hook has connection with one of the bars as at 12," in amanner to permit the same to pivot with relation to the bar, theopposite extremity of the arm extending to a position over the bars ofthe harrow, for purposes to be hereinafter more fully described.

The arm 12 is also relatively long and extends across the upper plane ofthe tooth bars 5 and has connection with the arm 10, as by means of thepivot pin 13, the opposite extremity of the arm 12 being curved as at14, and being pivotally connected to the opposite bar 5, as at 15.

A relatively short adjusting arm 16, has one extremity pivotallyconnected to the arm 12 as at 17, the opposite extremity thereofextending upwardly and connecting with the arm10 as by means of the bolt18 which passes through one of the openings 19, which are disposed inthe arm 16 in spaced relation with each other to permit of adjustment ofthe arm 16, withrelation to the arm 10.

A bracing bar indicated at 20 has one end connected to the arm 12 as at21, the opposite endthereof having connection with the arm 10 as at 22,the arm 10 being supported between one end of the arm 12 and bar 20, tosecure the same against lateral movement.

From the foregoing it is obvious that if the bolt 18 beremoved from theopening as shown by Fig. 2, and placed in the opening of the arm 16,nearest the free end of the arm 16, the bars will be moved closertogether, the teeth 6 supported thereby, being disposed at angles, tomore efliciently break the soil over which the device is operating.

Having thus described the invention, what is claimed as new is A harrowincluding a plurality of teeth bars, each bar having apertured lugssecured to opposite sides thereof, a link member having connect-ion withthe apertured lugs, a relatlvely long arm having a hooked member formedat one end of the arm, said hooked member having pivotal connection withone of the bars, a relatively long arm having one end thereof curved andconnected to one Patented Nov. 15, 1221.

of the outer bars and having its opposite end pivotally connected to thefirst mentioned arm, an adjusting arm having a plurality of openingsformed adjacent to one end thereof and having one end pivotallyconnected to the second mentioned arm, means extending through the firstmentioned arm and one of the openings of the adjusting arm for pivotallyconnecting the ad- 10 justing arm and first mentioned arm, and

the free end of the first mentioned arm being constructed to act as alever.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two Witnesses.

ERNST WVATSON MoNABB.

